Sprinkle the bacon evenly over the meat mixture, pressing firmly into meat.

Sprinkle cheeses evenly on top of bacon.

Place the spinach leaves on top of cheese evenly.

Starting at short end, start rolling up tightly, using foil to start the rolling process. You may need to tuck in spinach leaves as you roll. Seal ends when rolling is complete. Spread remaining pizza sauce over top, add the remainder of the cheese and any left over bacon. Bake for around 1 hour or until juices are clear or until thermometer inserted in meat loaf reads 160°F. Let stand 5 to 10 minutes before serving.